Door knob



FIG. 1 is a front view of my new design of a door knob;

FIG. 2 is a right side view of my new design of the door knob, a left side view being a mirror image thereof;

FIG. 3 is a top view of my new design of the door knob, a bottom view being a mirror image thereof; and,

FIG. 4 is a rear view of my new design of the door knob. 

The ornamental design for a door knob, as shown and described. 